Rotary engine



(No Model.) 2 Sheets-Sheet 1.

J. MOGASKEY & G. P. SHAW. ROTARY ENGINE.

No. 410,431. Patented Sept. 3, 1889.

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2 Sheets-Sheet 2.

J. MGGASKEY & 0. P. SHAW.

ROTARY ENGINE.

Patented Sept.

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UNITED STATES PATENT OFFICE.

JOHN MCCASKEY AND CHARLES P. SHAlV, OF N EW' CASTLE, PENNSYLVANIA.

ROTARY SPECIFICATION forming part of Letters Patent No. 410,431, dated September 3, 1889.

fieriel No. 313,675. (No model.)

To all wit-072v it may concern:

Be it known that we, JOHN MCOASKEY and CHARLES P. SHAW, of New Castle, in the county of Lawrence and State of Pennsylvania, have invented certain new and useful Improvements in Rotary Engines; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification, in which Figure 1 is a side view of our improved rotary piston-engine, one of the side plates being removed to show the interior construction thereof. Fig. 2 is a central vertical section transversely through Fig. 1. Fig. 3 is a detail view of the sleeve-adjusting device. Fig. 4 is detail side view of the eccentric for the cut-off valve Fig. 5, a detail view of the valveoperating rods; Fig. 6, a sectional view of the piston-carrying block.

This invention is an improvement in concentric-piston steam-engines; and its objects are to simplify the construction of such e11- gines, to provide improved packings therefor, and improved valve-mechanism, whereby the motion of the engine-shaft can be reversed or steam cut off therefrom in whole or in part; and it consists in the novel construction of the rotating annulus or sleeve and packingrings, the valve-gear, and in certain other novel details of construction and arrangement of parts hereinafter described and claimed.

Referring by letter to the drawings, A designates the casing of the engine, of cylindrical contour and supported on a suitable base a. B B designate side plates, which are removably secured to the annular portion 1) of the casing by suitable bolts and properly packed. C is the main shaft passing horizontally and axially through said casing and supported in bearings on plates B B, provided with stuffing-boxes c c, as indicated.

D designates an annulus or tubular sleeve surrounding shaft 0 within the casing and supported ecoentrically thereto in channels (1, formed in the inner faces of plates B, as shown, said plates preferably having ribs E on their outer faces, into which channels (1 01 extend, so as to permit the outer edges of said sleeve to project beyond the plane faces of plates B, as shown, and in the lower portions of ribs E channels (1 are enlarged into recesses c, in which are received arc-shaped shoes F, that support the sleeve, as indicated, and said shoes are vertically adjustable by means of screw-bolts f f, that are tapped through the lower faces of ribs E. By this means a close joint may be maintained between the uppermost portion of the sleeve and the inner face of the casing between the steanrports G g. The sleeve is longitudinally slotted at one side, as at H, for the passage of the piston.

K is a block rigidly secured on shaft 0 within the casing and sleeve, as shown. Said block has an offset 70, slotted longitudinally parallel with the shaft, and in this slot is received the inner end of piston J, which is a block of metal of sufficient width to fill the space between the side plates of the casing and project through the slot in sleeve D sufficiently to make a close joint with the inner face of annulus Z). The piston is secured to block K by means of bolts 71, which pass through enlarged holes in said piston to allow the latter to play slightly on the block, and 7' are springs interposed between the end of the piston and block and forcing the piston outward sufficiently to keep close join-ts between the same and the annulus b.

L L are packing-rings fitted within sleeve D and against the faces of plates B B, and kept in contact with the latter and in proper relative position by means of rods Z, which are placed between and separate the rings, their ends engaging holes in the inner edges of the rings, and M M are springs placed on one or both ends of rods Z and bearing against the same and the rings, and serving to force the latter firmly but yieldingly against plates B. Rings L are split at points coinciding with the slot in the sleeve, and their ends are concaved, as shown, to retain packing rods or rollers N N, that press against the opposite faces of piston J and form a tightjoint therewith without obstructing the protrusion and retraction of the piston through said slot as the sleeve revolves therewith.

G g are the steam-ports leading from a valve-chest 0, located preferably on top of the casing, and 0 is an outlet-port leading from said chest, but not communicating directly with the interior of the casing. m is a steam-supply pipe to said chest.

Pis a D slide-valve of sufficient length to cover both ports G g, if properly shifted, and prevent entrance of steam into the casing, as indicated in Fig. 1, but yet permit escape of steam therefrom. This slide-valve is operated by a rod 19, which projects through a proper stuffing-box in the end of the chest, and is pivotally connected by a link Q with an upstanding arm g on a rock-shaft R, that is journaled in bearings formed on an upstanding lever S, pivoted to a suitable support at bottom and provided at top with a dog 8, that engages with notches in a segment '1, rigidly connected to the casing or otherwise supported, by which means the lever S can be shifted and locked when shifted, this shifting of lever S of course shifting shaft R closer to or farther from the casing and altering the position of the valve in the chest.

Udesignates an eccentric mounted on shaft G outside the casing, and u designates an eccentric-rod properly connected with and operated by eccentric U and pivotally connected at its outer end to an arm 4', attached to shaft R, by which arrangement the rotation of shaft 0 causes the rocking of shaft R and consequent shifting of valve P. The eccentric U consists, essentially, of a disk U, mounted loosely and eccentrically upon the shaft 0, and having a semicircular slot in it, (shown at to, Fig. 4,) said slot being concentric to the shaft. Disk U is retained between the collar U secured rigidly to the shaft, and a disk U keyed to the shaft on the opposite side of the disk U and having a wrist-pin 11. engaging slot at, as shown in the drawings. Owing to this construction it will be apparent from the drawings that when the shaft 0 has turned sufficiently to engage pin a with one end of slot to the disk U will be rotated with the shaft and the valve-gear operated to cause the engineshaft to be driven in one direction. Now, in reversing, the shaft 0 turns independently of the disk U until pin 10 passes to the opposite end of slot u. The eccentric-disk remaining stationary until that time, we thus automatically adjust the eccentric when the engine is reversed. WVhen lever S is brought to the position shown in full lines, Fig. 1, which is to the center of segment T, the valve covers both ports G g in such manner that even if the engine-shaft be rotating neither port will be uncovered, and consequently no steam is admitted and the engine comes to a stop. By shifting the lever S to right or left one or the other of said ports is more or less uncovered and steam enters therethrough, causing the piston and shaft to rotate either right or left, the exhaust-steam escaping through the covered port below the valve into port 0 and thence to the atmosphere or condenser.

By this arrangement We can readily adjust the valve-gear so as to partially or wholly cut off steam at certain points in the revolution of the piston, and thus regulate the speed of the engine and utilize the expansive force of the steam.

Having thus described our invention, what we claim as new is 1. The combination of the casing having channeled side plates, the main shaft and piston, and the sleeve resting in the channels of said side plates with the adjustable shoes supporting said sleeve, substantially as described.

2. In a rotary engine, the combination of the casing and the rotating sleeve eccentrically mounted therein with the packing-rings in said sleeve and the rods and springs. separating said rings, all substantially as and for the purpose specified.

3. The combinatiomin a rotary engine, of the casing, the piston therein, and the inlet and outlet ports leading thereinto with the valve-chest, the slide-valve therein, the rockshaft R, connected to said valve, and the adjustable lever S, supporting said rock-shaft, all substantially as specified.

4. ,The combination of the casing, the rotata'ble sleeve therein eccentric to the shaft, the piston hung on said shaft and projecting through a slot in said sleeve, with the packing-rollers for said piston carried in said sleeve, and the packing-rim gs L L, all substantially as specified.

5. The combination of the casing, the main shaft, the rotatable slotted sleeve in said casing eccentric to said shaft, with the packing-rings in said sleeve, the springs and rods for separating the same, the piston hung on said shaft and projecting through the slot in said sleeve, and the packing-rollers for said piston within said sleeve, all substantially as described.

6. The combination of the casing, the rotatable sleeve therein eccentric thereto, and the concentric piston, substantially as described, and the inlet and outlet ports with the valve-chest, the valve therein, the rockshaft R, connected to and operating said valve, the eccentric loosely mounted on the main shaft operating said rock-shaft, and the adjustable pivoted lever S, supporting said rock-shaft, all substantially as described.

7. The combination of the casing, the rotating sleeve eccentrically mounted therein, and the packing-rings in said sleeve with the adjustable shoes supporting said sleeve and the piston projecting through said sleeve, all substantially as and for the purpose described.

8. The combination, in a rotary engine, of the casing, the inlet and outlet ports, the rotatable sleeve eccentrically mounted insaid casing, the packing-rings in said sleeve, and the piston and main shaft with the valvechest, the s1ide-va1ve therein, the rock-shaft our own We affix our signatures in presence connected to said Valve, the eccentric on the of two witnesses. main shaft and the connections between the same and rock-shaft, and the lever support- 5 ing said rock-shaft and the adjusting devices \Vitnesses:

therefor, all substantially as set forth. JOHN L. MORGAN, In testimony that We claim the foregoing as JOHN S. TAGGART.

JOHN MOCASKEY. CHARLES P. SI-IAWV. 

